1 km = 0.621371 mi
| Kilometer (km) | Mile (mi) |
|---|---|
| 1 | 0.6214 |
| 2 | 1.2427 |
| 3 | 1.8641 |
| 5 | 3.1069 |
| 8 | 4.971 |
| 10 | 6.2137 |
| 15 | 9.3206 |
| 20 | 12.4274 |
| 25 | 15.5343 |
| 30 | 18.6411 |
| 40 | 24.8548 |
| 50 | 31.0686 |
| 75 | 46.6028 |
| 100 | 62.1371 |
| 150 | 93.2057 |
| 200 | 124.274 |
| 250 | 155.343 |
| 300 | 186.411 |
| 500 | 310.686 |
| 1000 | 621.371 |
To convert kilometers to miles, multiply the number of kilometers by 0.621371. One kilometer equals approximately 0.621 miles.
1 km = 0.621371 mi
Convert 10 km to miles: 10 × 0.621371 = 6.2137 miles
Convert 100 km/h speed limit to mph: 100 × 0.621371 = 62.14 mph
To convert miles to kilometers, multiply the miles by 1.60934.
\u2022 5 km (3.1 miles) is the length of a standard 5K race — about a 30-minute jog for most people.
\u2022 10 km (6.2 miles) is a popular race distance and about a 50-minute run.
\u2022 42.195 km (26.2 miles) is the length of a marathon.
\u2022 100 km (62.1 miles) is roughly the distance from New York City to Philadelphia.
Kilometers and miles are the two main units for measuring long distances. The kilometer is the standard in virtually every country on Earth, while the mile remains primary in the United States and United Kingdom for road distances and speed limits.
One kilometer equals exactly 1,000 meters, making it a clean metric unit. One mile equals 5,280 feet or approximately 1.609 kilometers. The mile has ancient Roman origins — it derives from “mille passus” (a thousand paces).
If you’re renting a car abroad, understanding km-to-mile conversion is crucial. A speed limit sign showing 120 km/h means about 75 mph. A sign showing 50 km/h means about 31 mph. Many rental cars in Europe show both km/h and mph on the speedometer, but road signs are always in kilometers.
Runners constantly convert between kilometers and miles. The most common race distances — 5K, 10K, half marathon (21.1 km), and marathon (42.195 km) — are defined in kilometers but often discussed in miles: 3.1, 6.2, 13.1, and 26.2 miles respectively. Knowing the conversion helps you compare paces and set race goals.
Here’s a fun shortcut: consecutive Fibonacci numbers (1, 1, 2, 3, 5, 8, 13, 21, 34, 55...) approximate the km-to-miles conversion. 5 km ≈ 3 miles, 8 km ≈ 5 miles, 13 km ≈ 8 miles. The ratio between consecutive Fibonacci numbers approaches 1.618, remarkably close to the 1.609 km-per-mile conversion factor.
One kilometer equals approximately 0.6214 miles.
One mile equals approximately 1.60934 kilometers.
A 5K (5 kilometers) is approximately 3.107 miles.
100 km/h is approximately 62.14 mph.
The United States, United Kingdom, and a handful of Caribbean and other nations use miles for road distances. Most other countries worldwide use kilometers.